I just upgraded a couple sites to 2.3.4 (and have the same problem on all of them, including one fresh install at 2.3.4) and editor.css is no longer getting loaded by TinyMCE. I traced my requests with Firebug and saw that it was trying to call it at '[site_root]/css/editor.css' instead of from my theme directory. Looking through the code for a bit, it looks like it should prepend the 'THEMES_DIR' variable in front, but for whatever reason that's loading in blank. All these sites worked in 2.3.3.

The code is in the _config.php file for the cms module. This is the line is question:

'content_css' => 'cms/css/editor.css, '.(SSViewer::current_theme() ? THEMES_DIR . "/" . SSViewer::current_theme() : project()) . "/css/editor.css",

Any ideas on why it isn't loading? Thanks

NB: If I hard code the file to point to my editor.css file in the theme directory, it works, so I know it's not a problem with reading the file. Also, all the other function calls within the _config.php file work.

I too had this problem on a fresh 2.3.4 install which was not there in a 2.3.1. I checked the code in the _config.php of the cms module as referred to above and added a print_r() of the content_css line.
It was incorrect and contained neither the theme editor.css or the alternative project editor.css

After that I tried a print_r() of just SSViewer::current_theme() and it was blank which was obviously wrong

adding

SSViewer::set_theme('dreamy');

just above the HtmlEditorConfig::get('cms')->setOptions()

did the trick

This means that when this cms config is loaded the site config has not yet been loaded (which is clearly incorrect in this context and is a bug)

Julian

I also have this behaviour. Is there a fix or workaround available?

To workaround you can add, like tazzydemon described,

SSViewer::set_theme('myowntheme');

into cms/_config.php or reset content_css after set_theme in mysite/_config.php

HtmlEditorConfig::get('cms')->setOptions(array(
'content_css'=>'cms/css/editor.css, '.(SSViewer::current_theme() ? THEMES_DIR . "/" . SSViewer::current_theme() : project()) . "/css/editor.css"
));

http://www.silverstripe.org/content-editor-discussions/show/274755

Thanks - but this doesn't help for me because i'm using the silverstripe core shared for 60+ sites. I cannot put the theme name into the core code. I need a more flexible workaround.

I also tried to add a bug in the tracker - but it said the database is down.

freakout, you should still be able to use the second workaround JayDevlin suggested, reseting the content_cms in 'mysite/_config.php', since that should be different for each site (though conveniently you can paste the exact same code in each one).

this statement (SSViewer::set_theme('myowntheme'); ) _IS_ already in every mysite/_config.php !
this is exactly the bug because it is not read from mysite/_config.php!

to put it in mysite/_config.php is not a workaround because that's already the way it is normally.
this bug must be fixed and a flexible workaround must be given.